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Investigate 1.34.0-wmf.22 regression in RUM metrics for mobile
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Authored By
Peter
Sep 17 2019, 7:39 AM
Referenced Files
F30380168: Screen Shot 2019-09-17 at 9.45.51 AM.png
Sep 17 2019, 7:47 AM
F30380173: Screen Shot 2019-09-17 at 9.46.42 AM.png
Sep 17 2019, 7:47 AM
F30380154: Screen Shot 2019-09-17 at 9.41.32 AM.png
Sep 17 2019, 7:43 AM
F30380152: Screen Shot 2019-09-17 at 9.41.19 AM.png
Sep 17 2019, 7:43 AM
F30380142: Screen Shot 2019-09-17 at 9.37.56 AM.png
Sep 17 2019, 7:39 AM
F30380133: Screen Shot 2019-09-17 at 9.35.54 AM.png
Sep 17 2019, 7:39 AM
F30380136: Screen Shot 2019-09-17 at 9.36.38 AM.png
Sep 17 2019, 7:39 AM

Description

It looks like 1.34.0-wmf.22 introduced regression.

2019-09-16
13:04 hashar@deploy1001: rebuilt and synchronized wikiversions files: all wikis to 1.34.0-wmf.22
p75:

Screen Shot 2019-09-17 at 9.35.54 AM.png (796×2 px, 250 KB)

Screen Shot 2019-09-17 at 9.36.38 AM.png (800×2 px, 242 KB)

median:

Screen Shot 2019-09-17 at 9.37.56 AM.png (794×2 px, 251 KB)

https://grafana.wikimedia.org/d/000000143/navigation-timing?refresh=5m&orgId=1&from=1568469767131&to=1568705650311&var-source=navtiming2&var-metric=firstPaint

Looking into desktop vs mobile, I cannot see anything for desktop:

Screen Shot 2019-09-17 at 9.41.19 AM.png (800×2 px, 257 KB)

But for mobile it looks like this:

Screen Shot 2019-09-17 at 9.41.32 AM.png (788×2 px, 231 KB)

Event Timeline

Peter renamed this task from Investigate 1.34.0-wmf.22 regression in RUM metrics to Investigate 1.34.0-wmf.22 regression in RUM metrics for mobile.Sep 17 2019, 7:43 AM
Peter updated the task description. (Show Details)
Peter edited subscribers, added: Krinkle; removed: Aklapper.

Looking at WebPageReplay it isn't a change for all URLs but for some can see it:
enwiki sweden:

Screen Shot 2019-09-17 at 9.45.51 AM.png (1×1 px, 141 KB)

All seems to have jump at least with that release:
enwiki-obama:

Screen Shot 2019-09-17 at 9.46.42 AM.png (1×1 px, 143 KB)

For the de-wiki its there for two out of three tested URLs:
https://grafana.wikimedia.org/d/000000572/webpagereplay-drilldown?orgId=1&var-wiki=dewiki&var-device=mobile&var-browser=chrome&var-latency=100&var-page=Facebook